ALUMINIUM ALLOY COATED STEEL SHEET HOT FORMED PARTS AND METHOD OF MANUFACTURING THEREOF

• Main Authors: OH JONG GI, MIN KWANG TAI, SHIN DONG SEOK, HWANG HYEON SEOK, LEE SUK KYU
• Format: Patent
• Language: English; Korean
• Published: 13.12.2021
• Subjects: ALLOYS; CHEMICAL SURFACE TREATMENT; CHEMISTRY; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATIONOR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY IONIMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; COATING MATERIAL WITH METALLIC MATERIAL; COATING METALLIC MATERIAL; DIFFUSION TREATMENT OF METALLIC MATERIAL; FERROUS OR NON-FERROUS ALLOYS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUSMETALS OR ALLOYS; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION INGENERAL; MAKING METAL MALLEABLE BY DECARBURISATION, TEMPERING OR OTHERTREATMENTS; METALLURGY; METALLURGY OF IRON; MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THESURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; TREATMENT OF ALLOYS OR NON-FERROUS METALS

The present invention relates to an aluminium alloy coated steel sheet, hot formed parts and a manufacturing method thereof, and more specifically, to an aluminium alloy coated steel sheet that has excellent surface quality and weldability and can be preferably applied to steel sheets for vehicles, hot formed parts and a manufacturing method thereof. The aluminium alloy coated steel sheet of the present invention includes a base steel sheet and an aluminium alloy coating layer formed on the base steel sheet, wherein the aluminium alloy coating layer comprises 21 to 35 wt% of Zn, 1 to 6.9 wt% of Si, 2 to 12 wt% of Fe, and the balance Al and other unavoidable impurities and Al/(Zn+Si) is 1.3 to 2.6. 본 발명은 알루미늄합금 도금강판, 열간성형 부재 및 이들의 제조방법에 관한 것으로서, 보다 상세하게는 자동차용 강판으로 바람직하게 적용할 수 있는 표면 품질 및 용접성이 우수한 알루미늄합금 도금강판, 열간성형 부재 및 이들의 제조방법에 관한 것이다.